Adjusting The Engine Idling Speed - Yamaha T115FL-2P Owner's Manual

Periodic maintenance and adjustment
2. Pull the air filter element out.
3. Insert a new air filter element into
the air filter case as shown.
NOTICE: Make sure that the air
filter element is properly seated
in the air filter case. The engine
should never be operated with-
out the air filter element in-
stalled, otherwise the piston(s)
and/or cylinder(s) may become
excessively worn.
7
ZAUV0252
4. Install the air filter case cover by
installing the screws.
To clean the air filter check hoses
1. Check the hoses shown for accu-
mulated dirt, water or oil.
1. Air filter check hose
[ECA10482]
2. If dirt, water or oil is visible, re-
move the hose, clean it, and then
install it in its original position.
Adjusting the engine idling
speed
The engine idling speed must be
checked and, if necessary, adjusted as
1
follows at the intervals specified in the
periodic maintenance and lubrication
chart.
The engine should be warm before
making this adjustment.
TIP
1. Attach the tachometer to the
2. Check the engine idling speed
7-13
The engine is warm when it quick-
ly responds to the throttle.
A diagnostic tachometer is need-
ed to make this adjustment.
spark plug lead.
and, if necessary, adjust it to
specification by turning the throt-
tle stop screw. To increase the en-
gine idling speed, turn the screw in
direction (a). To decrease the en-
gine idling speed, turn the screw in
direction (b).
EAU21341